Umpire \Um"pire\, v. t. [imp. & p. p. {Umpired}; p. pr. & vb. n. {Umpiring}.] 1. To decide as umpire; to arbitrate; to settle, as a dispute. Judges appointed to umpire the matter in contest between them, and to decide where the right lies. --South. 2. To perform the duties of umpire in or for; as, to umpire a game. [Colloq.]